This function applies a query to each instance-set which matches the template. If an instance-set satisfies the query, then the function is immediately terminated, and the return value is the symbol TRUE. Otherwise, the return value is the symbol FALSE.
Syntax
(any-instancep <instance-set-template> <query>)
Example
Are there any men over age 30?
CLIPS> (any-instancep ((?man MAN)) (> ?man:age 30)) TRUE CLIPS>
This function applies a query to each instance-set which matches the template. If an instance-set satisfies the query, then the function is immediately terminated, and the instance-set is returned in a multifield value. Otherwise, the return value is a zero-length multifield value. Each field of the multifield value is an instance-name representing an instance-set member.
Syntax
(find-instance <instance-set-template> <query>)
Example
Find the first pair of a man and a woman who have the same age.
CLIPS> (find-instance ((?m MAN) (?w WOMAN)) (= ?m:age ?w:age)) ([Man-1] [Woman-1]) CLIPS>